What can a lumbar puncture examine in patients with encephalitis?

In general, lumbar puncture in patients with encephalitis can be used to measure pH, assess cerebrospinal fluid (CSF) appearance, detect bacteria and parasites, examine white blood cell count, and analyze immunoglobulins. Specific details are as follows:

1. pH measurement: The pH value of cerebrospinal fluid is an indicator for evaluating the acidity or alkalinity of the fluid. In cases of encephalitis, inflammatory responses may lead to abnormal pH levels, showing acidic or alkaline shifts, indicating a disruption in the chemical balance of the CSF.

2. Assessment of cerebrospinal fluid appearance: Examining the appearance of CSF allows observation of characteristics such as clarity, color, and turbidity. In encephalitis, the CSF may exhibit altered appearances, such as cloudiness or a yellow-green tint, which could indicate inflammatory reactions, bacterial infection, or other abnormalities.

3. Detection of bacteria and parasites: Testing for bacteria and parasites in the cerebrospinal fluid helps identify whether there is a bacterial or parasitic infection. When encephalitis is caused by bacterial infection, CSF analysis can determine the specific type of bacteria and its antibiotic sensitivity, thereby guiding treatment. Parasitic infections may also cause encephalitis in certain cases, making parasite testing an important diagnostic step.

4. White blood cell count: The white blood cell count in CSF serves as an indicator of the degree of inflammation. In encephalitis, white blood cell counts typically increase due to inflammatory responses, including elevated levels of neutrophils, lymphocytes, and other cell types. This measurement provides crucial information about the extent of inflammation and disease severity.

5. Immunoglobulin testing: Analysis of immunoglobulins in CSF evaluates the immune function within the central nervous system. In encephalitis, immunoglobulin levels may rise, reflecting either an inflammatory response or activation of the immune system.

Besides the above tests, lumbar puncture in patients with encephalitis can also be used to measure protein levels, myelin basic protein, glucose, and other parameters. Patients should receive treatment under medical supervision using medications such as Angong Niuhuang Pills or Acyclovir tablets, and maintain regular sleep patterns.